[ltp] Re: X61s and fan speed < level 1

[Günther Starnberger]

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On Sun, Mar 30, 2008 at 07:27:23PM +0200, I wrote:

> However, sometimes (especially when I boot the system immediately
> after shutting it down), the fan starts with 3200 to 3400 rpm and
> keeps running at this lower speed.

I just did one more test (running at "level auto" without doing any
changes to the fan settings):

After booting, the fan was running at about 3220 rpm. I then started two
Python processes which were running at 100% CPU time on both cores.

The CPU temperature slowly raised to 67 degrees (I killed the processes
at 67, so maybe it would have continued to raise), but the changes of
the fan speed were hardly noticeable. Maximum speed was at ~3290 rpm.

Could this be a bug in the embedded controller? Somehow this behaviour
seems a little bit strange: In most cases the speed of the fan is way to
high, it runs at 3800-4200 rpm even if a lower speed would be
sufficient. In other cases the fan starts at only 3200 rpm and keeps
running at this speed, even if the temperature is rising to high values.

Could anyone with a X61(s) post the /proc/acpi/ibm/fan and
/proc/acpi/ibm/thermal values when running at "level auto"?

bye,
Guenther

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